Xueba, I beg you to go and escort him quickly!

Xu Heng, "Give me a pen and paper."

He could still dictate, but he was afraid that Yue Pingting would be drawn into it.

In order to make her understand better, Xu Heng had no choice but to use pen and paper.

Xu Heng wrote while talking.

"When n is greater than k, according to the meaning of the question..."

"..."

"When n is greater than or equal to 9, every two terms form an arithmetic sequence, set up four terms of the arithmetic sequence, and simplify and deform according to the properties of the arithmetic sequence..."

"Obtain this sequence of numbers as an arithmetic sequence, the value of d can be obtained from the first term being equal to 1, and the formula for the general term of the sequence can be written according to the first term and the arithmetic difference."

“所以，就是an=1+2（n-1）=2n-1。”

Yue Pingting never expected that such a complicated idea of ​​solving the problem would end up with such a simple general term formula.

She froze for a moment.

Xu Heng, "Hey, are you dumbfounded by the result?"

Yue Pingting nodded, "Yeah! Seeing this result, I am so unwilling!"

Xu Heng smiled, and returned the title to Yue Pingting, "Look carefully! Think about it! I figured it out, and I will tear up the title."

Yue Pingting nodded, "Okay."

Originally, I could get home in 10, [-], [-] minutes, but today I drove for an hour.

Dad Yue drove very steadily.

Xu Heng saw that there were a lot of battery cars riding beside them and they disappeared!

There are even cars that run into everything.

very dangerous.

Xu Heng was not in a hurry, he took out his phone and swiped it.

Just glanced at the group news.

In the group, for some reason, biology was involved.

They posted a picture in the group.

Some students insisted that this appeared in biology textbooks, and they clearly remembered it clearly.

Some students also said that there is no such thing at all, and this is impossible.

Xu Heng looked at this picture and understood something.

This is Haeckel's embryo map, a photo map of embryo development.

It is indeed included in the high school biology textbook of the People's Education Edition, but it is indeed a big scam!

In Haeckel's time, accurate drawing was very important for human beings to convey their views

But under this background, it is this picture that has deceived many people!

Xu Heng directly asked in the group, "Isn't this a big scam in the theory of evolution? Why are you discussing this?"

At this time, Yue Pingting also came over and looked at the picture in the group.

"It's a bit familiar. Isn't this telling that human embryos have a fish stage during their development, and their appearance is extremely similar to fish embryos?"

Xu Heng, "Yes, this is the theory of embryo reenactment proposed by the biologist Haeckel more than 100 years ago to support Darwin's theory of evolution."

"He believes that the human individual repeats the process of germline evolution during embryonic development. Because humans first evolved from fish, the human embryo was very fish-like for a period of time."

"In the previous middle school or college biology textbooks, no matter whether they were in Chinese or English, whether they were published domestically or overseas, you could almost find pictures of Haeckel."

Yue Pingting became curious, "How did you find out later?"

Xu Heng, "Later, a doctor, who was also an embryologist, spent his whole life studying human embryos, but he had never seen a fish stage in a human embryo."

"So he's determined to right what's been wrong for over 100 years."

"He organized scientists from 17 units to study the embryos of more than 50 different vertebrates and their development process, and finally exposed Haeckel's deception."

When Xu Heng was talking to Yue Pingting, the group had already exploded.

While everyone was surprised, they were also very curious why Xu Heng is also very good at research on biology!

This is far beyond the cognition of a high school student!

Say it again!

Xu Heng has already excelled in mathematics, Chinese, and physics. Is it possible that he will also be the best in chemistry and biology?

"Hiss...it's too scary! Xu Heng, how many vests do you have! Hurry up and explode yourself!"

"Xu Heng, how many vests do you have?"

"..."

Because the school final exams are over, it's already a holiday.

The heat in the group has picked up.

A group of people swarmed after him.

But there are also students who would like to hear Xu Heng talk about this "biological deception".

"Master Xu Heng! Please tell me!"

Xu Heng could only talk while typing in the group.

"Later, the embryonic data of 8 representative animals drawn by the doctor showed that the embryos of various animals in the first stage were not as similar as Haeckel described, and the embryos of these animals were quite different."

"Heckel deliberately selected embryos that were more similar."

"He chose the aquatic salamander instead of the frog because the salamander itself is more like a fish."

"In contrast, frogs are not very fish-like. Representatives of Cystostoma and cartilaginous fishes are farther from Haeckel's expectations, so Haeckel did not choose them."

"More importantly, this Haeckel also manipulated the picture, digging out the nose, heart, liver and most of the internal organs of the human embryo, as well as the germs of the hands and feet, and then lengthening the spine to form a tail. embryos are similar to fish embryos."

"Haeckel didn't just cut out, he added at will. For example, chicken embryos, at this stage, have eyes that are different from other animals and have no pigment. Haeckel blackened them to make them different from other animal embryos. unanimous."

"Haeckel also randomly changed the size ratio to increase the similarity of different embryos."

After saying this, everyone, including Yue Pingting, couldn't help but wonder, "Why did he do this?"

Xu Heng, "Maybe this person is a fan of Darwin! Or, he is also famous for himself!"

In the group, when looking at Xu Heng, they have begun to call him all-rounder.

Yue Pingting was very curious, "Xu Heng, how do you know this? Haven't you seen you read a book? When you swiped your phone, did you get it?"

"???"

Xu Heng smiled mysteriously, and in order to get rid of the topic, he glanced up and down at Yue Pingting.

In an instant, Yue Pingting felt guilty, "What are you doing? Why are you looking at me like that?"

Xu Heng, "Have all the questions? Come on, give it to me, I'm going to tear it up!"

"Don't! Not yet, I haven't finished reading it yet! Don't..."

Xu Heng, "%￥##￥￥..."

"Then why are you joining in the fun!"

Yue Pingting stuck out her tongue and took the time to read her own topic.

Xu Heng smiled and continued to look out the window.

Fortunately, it didn't take long to get home.

The car drove directly to Xu Heng's house.

After Father Yue got out of the car, he let out a long sigh of relief.

"It's so tiring! My whole body is tense! Fortunately, I got home safely!"

Xu Heng took the luggage down.

Father Yue said to Yue Pingting, "It's been snowing for the past two days, and the water in the house has been frostbitten! You live at your uncle's and aunt's house!"

"Their new house has done a good job of keeping warm!"

Yue Pingting just opened her mouth to say something, but Yue's father said again, "When the temperature rises and the water stops freezing, you can go home."

"I discussed this with your mother."

Yue Pingting, "Alright...!"

I understand the truth, but...Dad!What do you mean by taking all my luggage down?

Are you not going home for me?

???

The bad thing about winter in the countryside is that the tap water at home will freeze, and it will freeze very badly.

Many people start to use well water in winter.

In the past, Xu Heng's family was also like this, but this year a new house was built, and the anti-freeze was done very well.

Entering the home, the heating comes on.

This was taken into consideration by Han Honghu and the others when building the house.

Xu Heng looked very satisfied.

On the second floor, Xu Heng was not in a hurry to go to his room, because there was an e-sports room next to the study.

It hadn't been done before, but as soon as it was done in the past two days, Han Honghu sent a message to tell him, it's done!

Let Xu Heng go home to see if there is anything missing, and he will revise and supplement.

It can be said that Han Honghu took great pains.

Not only did Xu Heng decorate a sci-fi version of the e-sports room, but the equipment inside is also very complete!

Anyway, at least hundreds of thousands are needed!

Currently, there are three high-end computers in the e-sports room.

Even Yue Pingting was amazed by the scene before her when she came in.

Once the lights are turned on, all kinds of light strips give people a very dreamy feeling.

There are also projections, figures, etc. next to it.

They have prepared everything that Yue Pingting can think of or can't think of.

Yue Pingting looked at the figurines on the display cabinet, and her eyes lit up, "Hokage's? Pirate's? There are so many Chinese comics! My God! So beautiful! Xu Heng, when did you collect them?"

Xu Heng shrugged, "Boss Han and the others must have given it to you!"

Yue Pingting, "Why didn't you bring me to this room earlier!"

Xu Heng, "It didn't work before. Boss Han said he would prepare it for me again, but I didn't take it seriously. I never expected that the computer and everything would be equipped for me!"

Xu Heng looked at the figurines intently. He didn't like it, but Yue Pingting liked it very much.

She even searched online, "My God, the one that's bigger than a palm costs several thousand yuan! Is it limited?"

"???"

"Oh my god! I'd better put it down quickly! If it gets damaged..."

"Hiss! Xu Heng, you are too rich!"

Xu Heng rolled his eyes, "I said it all, he was the one doing it."

This Han Honghu is really caring.

Xu Heng sat down and leaned back. The ergonomic chair is very comfortable!

Yue Pingting checked the same item on her mobile phone.

"Xu Heng! This chair costs seven or eight thousand!"

"Don't move... just wait a moment! Your mouse and keyboard cost thousands!"